(1) Not buying a pair of B&W 802 Matrix 3 rosewoods for myself when I was still a dealer
(2) Not buying a pair of M-L's when I realized I should have bought the B&W's
(3) Not buying a ITC 1/4 system when ITC was still around, and I still had Matrix 2's
(4) Getting rid of my first L-P system (at least I corrected that huge one!)
(5) Not getting a VPI, SOTA or AR for myself with a Alpha1 when I was a dealer for those, as well
(note the trend - when you're in the business you never buy anything for yourself! And you regret it later!!

)
(6) Doing (early) home theater installs (and losing the fun from just listening when I had to deal with a-ho' customers in their own homes)
(7) Not making up my own pair of MIT's longer than I needed at the time, in 1m rather than .5m, and now I can't use them (sob) (lesson - always buy IC's just a bit longer than you need them
now so that
later, when you move things around, you've got extra to play with)
(8) Selling the first generation of CD players to customers - the Phase Linear and the Dual - even though they sounded like shiate and we knew it, too!
Even though we educated a lot of people back then on how bad "perfect music, always" really sounded it (compared to vinyl) was still backing the Dark Side of the Force.


But it was good times shooting down people who insisted that CD sounded better because that's what they read, when we did a side-by-side "blind" comparision...and the customer picked vinyl, every time!)
(9) Not going to more unamped jazz / blues / rock / R&B sessions (I'm working on that, but I think "unamped" is going the way of "uncompressed")
(10) I still have more time to make more "mistakes"!